Typewriting machine



Oct, 30, 1928. 1,689,888

L. C. MYERS ET AL TYPEWRITING MACHINE Filed Sept. 16. 1926 4 Sheets-Sheet 1 INVENTORS L. G. Myers L. c. MYERS ET AL TYPEWRITING MACHINE Filed Sept 16, 1926 4 Sheets-Sheet 2 mvgNToRs V L. .M yers BY G-EH Oct. 30; 1928; 7 1,689,888 L. C. MYERS ET AL TYPEWRITING MACHINE Filed Sept; 16, 1926 4 Sheets-Sheet s L' ZLWZ I 5 BY G-EHaIldllE ATTOR EYS Oct. 30, 11928.

L. C. MYERS ET AL TYPEWRITING MACHINE 4 Sheets-Sheet 4 Filed Sept. 16, 1926 INVENTORS Langem v BYGJ! H ATT NEYS Patented Oct. 30, 1928.

UNITED STATES PATENT oF-FmE.

POBLTION 01 NEW YORK- LIWIB O. OI FBEEPOBT, AN D GEORGE F. HANDLEY, 0F GLENDALE,NEW YORK, ASSIGNORS T0 ROYAL TYPEWBITER COMPANY, INC., OF NEW YORK, N. Y., A 003- mnwm'rmo moms.

Application ma September 16, 1926. Serial No. 135,904.

This invention relates particularly to an improved form of type action which is es ecially adapted for use with typewritmg machines having a shifting type segment for case shift purposes.

. The invention is illustrated in the well known Royal standardmachine but features thereof ma be used in other types of ma chines so that the illustration is not to be regarded as limiting the scope ofv the inven-' tion. The particular manner in which the type segment is mounted for shifting move- -ment forins no part of the present invention. The means for shifting the segment may be any desired means and is not illustrated.

Further features of the invention will be apparent from the followin scription and the appended c aims.

In the drawings:

Figure 1 is a front view of a type segment,-

platen and portions of the operating mechanism and the type bars with parts in section. a I

Figure 2 is a fore and aft sectional'view throughout the machine showing the entire type action.

igure 3 is a side view showing the four banks of keys and the connections from the ke levers to the front links. 4

igure 4 is a vertical section with parts in elevation showing means for adjusting the tension of the type bar return springs.

Figure 5 is a side elevation of a single type action'with the type bar in printing position.

Figure 6 is a side elevation showm a series of intermediate levers and the .di erent points of connection of links thereto.

F1 're 7' is a top plan view of the keyboar andtype segments showin certain type bars and connecting links with parts broken away.

As stated above, the invention maybe embodied in various types of machines and the drawings show portions of the main frame A, a carriage B supporting a platen C and adapted to travel upon a rail D by means of interposed ball bearings. The carriage is provided with a rack bar. E which meshes with a pinion F on the shaft of which is supported an e'scapement wheel G with which cooperate the usual escapement dogs H operdetailed de- I .ated by means of a universal frame I. The

type bars K are in part of the usual form and are supported at their heads by a t rest L, also of the usual construction. 0 far as the invention is concerned, the above described parts may be of any usual or desired construction. i Key levers 1 are arranged in four banks -as usual and are all supported on a pivot nate y long and short. These links are guided in slots. in the bar 6. Short links 9 connect the key levers 1 with the front links 8 and the point of connection with said front links varies for the different banks of key levers as shown in Figure 3.

The portion of the action thus far described is substantially that of the Royal standard machine, although other forms of construction may be employed.

The type bars are supported on a pivot wire 10 carried'by a type segment 11 which has at its edges rails 12 adapted to cooperate through ball bearings 13 with similar rails 14 carried by the sides of the frame. In this manner the type segment is mounted for shifting movement. At each side of the segment is an outwardly extending stop arm 15 which fits between and engages at the limits of its movement with one or the other of the adjust-able spring stops 16 and 17.

These are of such-character that while they cushion the movement of the type segment position, and the segment is shifted downwardly for case shift movement. This brings the type bars K from 'the full to the dotted line position of Figure'2. V

A bracket 18 extending from side to side of the machine is connected by screws 19 one on each side to the bracket 3. This bracket has an upper enlarged end 20, the rear portion of which supports apivot rod 21 upon which are pivoted a number of intermediate levers 22 corresponding to the number of type bars. .These levers 22 are shaped outwardly to the rear as illustrated, forming an inwardly extending curved slot 23. A. dust guard 24 is fastened by screws 25 to the upper part of the bracket 18 and covers the bearing slots in the bracket and also extends into the curved slot 23. This slot is of suflicient extent to permit the intermediate leVers to be fully actuated without contacting with the guard 24.

It may be here noted that a plate 26 is interposed between the brackets 18 and 3 and fastened by means of the screws 19,

'which plate extends forwardly over the 1 key lever.

pivots of the key levers and acts as a dust guard for the same. To the forward end of this plate is attached one end of a 5 ring 27, the other end of which is attache to :1

There is of course a separate returning spring for each of the key levers.

A link 28 is attached at its front end to each of the front links'8 and in the usual Royal construction the corresponding link is attached at its rear end to the heel of the type bar. In the present construction, owing to the shifting movement of the type segment, it is necessary to inter-pose intermediate connections so that the link 28 is attached at its rear end to a point 28 on the intermediate lever 22. Links 29 all of which are of the same length, connect the intermediate levers 22, being fastened thereto at- 31 with the long heels 30 of the corresponding ty e bars to which they are pivoted at 32. ach type bar works in a slot 33 in the type segment andisbent at a point 34 where the bar enters the type guide M as shown in Figure 1.

In order to preserve uniformity of action, it is necessary that the intermediate levers 22 shall vary in length uniformly. from the center of the machine toward its sides and that the links 28 shall be connected thereto at different points as illustrated in Figures 1 and 6. The relation between the various parts may be defined as follows: taking the point 34 in Figure 1 as the center, the pivot rod 10, the points 32 in the heels of the type bars to which one end of the links 29 is fastened and the points 31 in the upper ends of theintermediate levers 22, to which the other ends of the links 29 is fastened, lie in three concentric arcs. The pivot rod 2 for the key levers, the pivot rod 7 for the front links 8 and the pivot rod 21 for the intermediate levers are all parallel to each other but lie in different vertical and horizontal planes. In this manner by connecting the links 9 to the front links at different points, and attaching the links 28 to the intermediate levers at different points, a uniform action can be obtained nothwithstanding the varying lengths of the intermediate levers and the different positions of the type bars in the segment.

When the type segment is shifted, the type bars K will be moved downward to the dotted line position of Figure 2, the pivot 10 of the type bars taking up the position 10' and the pivot point 32 taking up the position 32 while the position of the pivot point 31 remains unchanged. The parts are so proportioned that the points 32 and 32 lie equidistant from but on opposite sides of a plane passing through the pivot 31. In this manner the action remains unchanged when the type segment and type bars are shifted since it is immaterial whether the point of connection of the link 29 is above or below the mid-position.

Links 35 are attached to the intermediate levers at points 36 and have rear hooked ends 37 which engage a portion 38 of the universal bar frame I and operate the same whenever a type bar is actuated. Returning springs 39 for the type bar are coiled about a portion of each link 35 and at their front ends are engaged to a point 40 which is formed by swaging a portion of the link and stamping a hole therethrough. At their rear end these springs engage a bar 40' which is part of a bracket pivoted at 41 upon arms 42 extending forwardly from the machine frame A. A screw 43 is threaded through the lower part of the bracket 40' and bears at its rear end against a projection 44 from the main frame. A lock nut 45 is provided for holding the screw in adjustcd position. The screw is provided with a finger wheel 46 by which it may be turned as desired. This construction affords a ready means for simultaneously adjusting. the tension of all of the returning springs for the ty e bar action.

It will e noted'that the point of connection of the link 28 with the intermediate lever 22 is so chosen that the maximum leverage is afforded when the parts are in normal position and that the leverage decreases as the parts are put into use. The connection of the universal bar link to the intermediate lever is also so positioned as to exert the greatest leverage and the slowest action at the initial movement of the universal bar. This provides the usual accelerating motion, It may be further noted that the pionts 28 where the links 28 connect to the intermediate levers 22 are located at the sides of the machine in a lower position than the points 36, which are the points of connection of the universal bar links 35. These two points vary relatively to each other and at the center of the machine their relation is just reversed, the point 28 being the highest and the point 36 the lowest. This is clearly shown in Figure 1. v All of these features combine to afford an accelerating action which is uniform throughout the keyboard and in either shifted position of the type segment.

It is obvious that various details may be used alone or in connection with other devices and that portions of the construction may be modified without in any way departing from the spirit of the invention which is to be regarded as limited only by the scope of the appended claims.

We claim as our invention:

1. In a typewriting machine having the usual key board and a shifting type segment with type bars pivotally mounted therein; connections between the key levers and type bars which comprise a series of front links, "a series of intermediate levers which vary in length from the center to the sides of the machine, a series of links connecting the key levers with the front links, a series of links connecting the front links with the intermediate levers, and a series of links connecting the intermediate levers with the type bars. I

2. In a typewriting machine having the usual key board and a shifting type segment with type bars pivotally mounted therein; connections between the key levers and type bars which comprise a series of front links,

a series of intermediate levers which vary in length from the center to the sides of the machine, a series of links connecting the front links to different oints of the intermediate levers, and a series of links of equal length connecting the intermediate levers with the type bars.

3. In. a typewriting machine having the usual key board and a shifting type segment with type bars pivotally mounted therein; connections between the key levers and the t pe bars which comprise a series of front inks, a wries of connections between the key levers and the front links which engage the latter at different points,

a series of intermediate levers varying in length from the center of the machine towards the side, links connecting the front .links and the intermediate levers and engaging the latter at different points, and a series of links connectin the intermediate levers with the heels of t e type bars.

4. In a typewriting machine having the usual keyv board anda shifting type segment with type bars pivotally mounted therein; connections between the key levers and the type bars which com rise a series of alternately long and short vont links, a series of connections between the key levers and the front'links which engage the latter at different points, a series of intermediate levers-varying in length from the center of the machine towards the side, links connecting the front links and the intermediate levers and engaging the latter at different points, and a series of links of equal length otally'mounted therein; a series of type actions comprising key levers arranged in four banks, a series of front links, links connected to the key levers and to the front links at different points for each bank of key levers, intermediate levers increasing in length from the center towards the side of the machine, links connected to the front links and to the intermediate levers at different points, and connections between the intermediate levers and heels of the type bars.

6. In a typewriting machine having a shifting type segment with type bars pivotally mounted therein; a series of type actions comprising key levers arranged in four banks, a series of front links, links connected to the key levers and to the front links' at different points for each bank of key levers, intermediate levers increasing in length from the center towards the side of the machine, links connected tothe front links and to the intermediate levers at different points, and links of equal length connecting the intermediate levers with the heels of the type bars.

'7. In a typewriting machine having a shifting type segment with type bars pivotally mounted therein; a series of type ac-' tions comprising key levers all pivoted on a common axis in front of the pivots of the type bars, a series of intermediate levers pivoted'on a common axis in front of the type bar pivots and in the rear of the key lever pivots, said intermediate levers increasing in length from the center of the machine towards the side, connections bea tween the key levers and the intermediate levers which include front links pivoted at one end to a fi-xed part and links-of equal length connecting the intermediate levers and the heels of the-type bars.

8. In a typewriting machine having a shifting type segment with type bars pivotally mounted therein; a series of type actions comprising key levers all pivoted on a common axis in front of the pivots of the type bars, a series of intermediate levers pivoted on a common axis in front of the type bar pivots and in the rear of the key lever pivots, connections between the key levers and the intermediate levers including a series of front links pivoted on a common axis in front of the key lever pivots, and a series of links connecting the intermediate levers and the heels of the type bars; the

pivotal axes of the key levers, front links and intermediate levers being arallel but lying in different vertical an horizontal planes.

9. In a typewriting machine having a shifting type segment with type bars pivotally mounted therein; a series of type actions comprising key levers all pivoted on a common axis in front of the pivots of the type bars, a series of intermediate levers pivoted on a common axis in front of the type bar pivots and in the rear of the key lever pivots, connections between the key levers and the intermediate levers including a series of front links pivoted on a common axis in front of the key lever pivots, and a series of links connecting the intermediate levers and the heels of the type bars; the pivotal axes of the key levers, front links and intermediate levers being parallel but lying in different vertical and horizontal planes and the pivots of the type bars, the points of connection between the heels of the type bars and the links and the points of connection between the links and the intermediate levers lying in arcs of three concentric circles.

10. In a typewriting machine having a shifting type segment with type bars pivotally mounted therein; a series of type actions comprising key levers, a series of intermediate levers, connections between the key levers and intermediate levers and connected to the latter at points varying from the center towards the side of the machine, connections between the intermediate levers and the type bars, and universal bar operating links connected to the intermediate levers at points varying from the center towards the side of the machine.

11. In a typewriting machine having a shifting type segment with type bars pivotally mounted therein; a series of type actions comprising key levers, a series of intermediate levers pivoted on a fixed straight axis, said levers varying in length from the center towards the side of the machine, conncctions between the key levers and intermediate levers and connected to the latter at points varying from the center towards the side of the machine, links of equal length connecting the intermediate levers and the type bars, and universal bar operating links provided with type bar returning springs and connected to the intermediate levers at points varying from the center towards the side of the machine.

12. In a typewriting machine having a shifting type segment with type bars pivoted therein; a type action comprising a key lever and connections between the key lever and the type bar including an intermediate lever; said intermediate lever having connected thereto a link extending to the'type bar, a link forming part of the connections to the key lever, and a universal bar operating link.

13. In a typewriting machine having a shifting type segment with type bars pivoted therein; a series of type actions including intermediate levers pivoted in front of the type bar pivots, universal bar operating links pivoted to said intermediate 10- vers at different points thereon, and type bar returing springs connected to said links.

14. In a typewritirig machine having a shifting type segment with type bars pivoted therein; a series of type actions including intermediate levers pivoted in front of the type bar pivots, universal bar operating links pivoted to said intermediate levers at different points thereon, type bar returning springs connected to said links and a common means for adjusting the tension of said springs.

15. In a typewriting machine .having a shifting type segment with type bars pivoted therein; a series of type actions including intermediate levers pivoted in front of the type bar pivots, universal bar operating links pivoted to said intermediate levers at dill'erent points thereon, and type bar returning springs connected at one end to eyes swaged and punched from said links.

16. In a typewriting machine having the usual key board and a shifting type segment with type bars pivotally mounted therein, and in which the key levers are pivoted in front of the type bar pivots; connections between the key levers and the type bars which comprise a series of intermediate levers pivoted on an axis lying in a vertical plane between the type bar pivots and the key lever pivots, connections between the key levers and intermediate levers including a series of front links pivoted at their front ends to a fixed part, and a series of links connecting the intermediate levers with the heels of the type bars, the pivots of the type bars, the points of connection between the intermediate levers and the links, and the points of connection between the links and the heels of the type bars lying in arcs of three concentric circles.

17. In a typewriting machine having the usual key board and a shifting type segment with type bars pivotally mounted therein, and in which the key levers are pivoted in front of the type bar pivots; connections between the key levers and the type bars which comprise a series of intermediate levers pivoted on an axis lying in a vertical plane between the type bar pivots and the key lever pivots, connections between the key levers and the intermediate levers including a series of front links pivoted at their front ends to a fixed part, and a series of links connecting the intermediate lovers with the heels of the type bars, the pivots of the type bars, the points of connection between the intermediate levers and the links, and the points of connection between the links and the heels of the type bars lying in arcs of lllh three concentric circles, and the pivots of type bars, key levers, and intermediate levers lying -in different vertical planes.

18. In a typewriting machine having a shifting type segment with type bars pivotally mounted therein; a series of type actions comprising key levers all pivoted on a common axis in front of the pivots of the type bars, a series of intermediate levers pivoted on a common axis lying in front of the-type bar pivots andin the rear of the key lever pivots and in a different horizontal lane from either, connections between the key levers and the intermediate levers which include front links pivoted at their front ends to a fixed part and links pivoted to their rear ends, and connections between the intermediate levers and the type bars.

19. In a typewriting machine having a shifting type segment with type bars pivoted therein; a type action comprising a key lever pivoted toward the front of the machine, an intermediate lever pivoted at one end intermediate the pivot points of the type bar and'key lever both vertically and horizontally, a flexing connection between the key lever and the intermediate lever which includes a link pivoted at its front end, and a link connecting the free end of the intermediate lever with the heel of the type bar.

20, In a typewriting machine having a shifting type segment with type bars pivoted therein; a type action comprising .a key lever pivoted toward the front of the machine, an intermediate lever pivoted at one end intermediate the pivot points of the type bar and key lever both vertically and horizontally, a flexing connection between the key lever and the intermediate lever which includes a link pivoted at its front end and having its free end connected by a link to an intermediate portion of the intermediate lever, and a link connecting the free end of the intermediate lever with the heel of the type bar.

In testimony whereof, we have hereunto subscribed our names.

LEWIS C. MYERS. GEORGE F. HANDLEY. 

